Press for adhesive union of shoe sole components



PRESS FOR ADHESIVE UNION' OF SHOE SOLE COMPONENTS Filed May 15, 1940 Patented Nov. 18, 1941 PRESS FOR ADHESIVE UNION oF SHOE soLE a COMPONENTS John Hoza, Belcamp, Md.

Application May 13, 1940, SerialNo. 334,971 In Czechoslovakia July25, 1938 14 Claims.

This invention relates to an improved press for use in the operation of uniting sole components to the remainder of shoes by adhesion, for example in accordance with the Ago process, for which operation a'shoe is supported by a collapsible last.

In the aforesaid operation, as carried out by the presses heretofore customary, pressure was exercised upon the lasted shoe at two places, namely on the toe and on the heel. No pressure whatsoever was applied between these places. Now, the collapsible lasts used are composed of a toe component and a heel component interconnected by means including a spring, and therefore it has transpired that the application of pressure to these two parts but not to the interconnecting means has the harmful effect of forcing upon the said means a, reactionary upthrust. The interconnecting means, especially the spring, suffers from such upthrust and in course of time becomes so defective as to be more or less useless, as deformation of the shoes ,In use of such a press, the interconnection between the components of the collapsible last are safeguarded against harmful upthrust.

Another object of the invention is to provide means for automaticallyproportioning the additional intermediate pressure in relation to the other pressures. V

Another object of .the invention is to effect the .desired automatic proportionment by appropriately coupling the means for applying the additional intermediate pressure to the means for applying pressure, say, to the heel.

Another object of the invention is to provide the press with an improved clamping yoke for applying the requisite clamping pressures to the respective places onthe lasted shoe.

Other-objects of the inventionwill be apparent from the following specification and claims.

The invention will now be described by way of example with reference to the accompanying drawing which shows the improved press diagrammatically in sectional elevation.

The press includes a base I to which is attached in known manner a bladder 2 incorporupon, the bladder being made of resilient material such as some appropriate sort of rubber and'being adapted to form with the base I an air cushion. Compressed air is admitted to the cushion through an opening 28, for example under the control of a regulatable valve (not shown) The base I, at its rear or operating end, is provided with a lug 3 to which a clamping yoke 5 is pivotally connected by a bolt 4.

The yoke 5 is fitted with three suspensory pressers, namely: a presser 6 to act on the toe of the lasted shoe, a presser 8 to act on the heel of thelast 9 and an intermediate presser! to act at an intermediate place on the last, which is represented by thin lines in the drawing. The front end of the yoke 5 is arranged to pass through an opening for it in the base I and is made asa ratchet-toothed rack In engageable by a complementary toothed self-locking detent or pawl l l whenever the yoke is pressed down into its operative position to close the press. The yoke isshown in this position by full lines in the drawing. The detent l I is formed as a bellcrank lever. fulcrumed at [2 on the base I, one arm of said lever being toothed as aforesaid to lock the yoke 5 automatically and the other arm being provided to facilitate retraction of the detent to release the yoke in order that it can "be raised to open the press for insertion of a lasted shoe or for removal of such. The detent is normally urged to maintain its locking position by a spring Ila. The yoke has an abutment Hi to which can be applied. a plunger l3 actuated by power-for example pneumatic power-to exercise to requisiteipress-closing pressure on the yoke about the pivot bolt 4. The plunger l3 acts in opposition to a press-opening spring I6 which is anchored to a lug I! on the underside of the base I and which is connected to a downward extension l5 of the yoke below the pin]. The yoke is partly shown in its fully raised position by dotted lines. This position is defined by a'limit abutment l8 on? the base and a co-operating face IS on the extension l5. K

The spring l6 acts to open the press whenever the detent H is retracted to free the yoke '5. Retraction. of the detent is automatically .effected by means provided for the purpose, such means being actuatedvafter deflation of ,the air cushion l, 2. 1 An automatic pressure-proportionating device is interposed between the heel-presser 8 and the mid presser l to ensure that, when the press is ating a seat for the sole of each shoe to be acted closed, the pressures exercised by these two pressers are maintained equal or in some other predetermined proportional relationship. This device comprises a doubly toothed coupler 20 which is journalled on a pin 2! on the yoke 5 and which has, on the one hand, teeth 22 meshing with rack teeth on the heel-presser 8 and, on the other hand, teeth 23 meshing with rack teeth on the carrier Ia. of the mid-presser 'l. The mid p'resseris' pivotally attached to its carrier, and the carrier is slidably mounted in the yoke 5, being pressed downwards by a spring 21.

Regarding the toe-presser 6, this is adjustabl y mounted on a carrier 6a which is pivotally attached at 24 to the yoke and which is mamtained by a spring 25 against a screw-adjustable abutment 6b.

Regarding the last 9, this is of the collapsible type, consisting of a toe portion and "she-e1 portion which are pivotally interconnected by means including a spring 26. It is this spring in particular which is so seriously stressed and in of time damaged when such a last is used the presses heretofore known and which is safeguarded byadoption er a press having a midpres's'er '8 such 'as heremberere described with rerereiieete the accompanying drawing.

The proportional relationship or ratio between the pressures exercised by the heel-press and the mid-pres are determined by the pitch-61 cm radii of the teeth 22 and 23, respectively. The

proportionality advantageously be such that said pressures equal one another, so that the pressure exercised by the mid-presser will be of .the pressers 8 above and the ihfiate'd 'cush- .1: ion 2 below, an in readiness for "the necessary 'e'pei'etiehs ortreatinent'to be performed on the lasted slide. Thereafter the air-{Cushion seat is deflated, the detent n is retracted, and t e yoke is raised. Thus the shoe may be removed from the tapes press and rewarded by 'aiiother.

In the closure of -the press, the ressure-proportionating device automatically operates to cause a uniform proportionm'e'nt of the pressure iapplid 'by fthe heel-presser '8 and the "midpresser 1. This pressure is maintained until the press is put out or operation on deflation of the air-'eushi'on seat. e I claim '1'. 'A pre'ss 'forapplyin'g pressure to a shoe supported by a last and comprising a yoke, a plu- "rainy or pressers for a plying pressure to the lasta't spaced places thereof said pressers being'mou'ntd on said yoke and 'b'ein'g individually "m'eveuem relation thereto, and mean's'couplin'g said pressers together so that when either of them is moved said means constrains the other t'o'move oppositely and to a proportionate'extent. .2. In "a'p'r ess for applying pressure to a shoe supported by a laslfa'nd'con'iprisiiig a toe presser and a hee1p'resse'r,en additional preiss er mounted intermediate said toe presser andheel presser, imeansforapplying said additional presser to the .last t a place intermediate places :of a plicat on ,of said toe and-heel pressers, and means coupling one of said two first-mentioned pressers to said additional presser to maintain a predetermined proportionality between the pressures applied by the respective pressers.

3. A press for clamping a shoe supported on a collapsible last consisting of a toe component, a heel component and a pivotal connection between said components, said press comprising a toe presser to apply pressure to said toe component, a heel presser to apply pressure to said heel component, an additional presser to apply pressure to said pivotal connection, said heel and additional pressers being movable relatively to uregremaineer of the press and to one another, and means coupling said heel and additional pressers together so that when either of them is moved said means constrains the other to move oppositely and to a proportionate extent.

A press for clamping a shoe supported on a collapsible last consisting of a toe component, aheel component and a pivotal connection between 'sai'd components, said press comprising a yoke, a toe presser to apply pressure to said toe component, a heel presser to apply pressure to said heel component, said we and heel pressers being mounted on said yoke at locations spaced apart, an additional presser mounted at an intermedi'ate location on said yoke to apply pressure to s'aid pivotal connection, and means mounted on said yoke and coupling one of said toe and heel pressers to said additional presser in order to maintain a predetermined proportionality between pressures applied by said one presser and said additional presser.

5. A press according to claim 4 in which said means for maintaining proportionality of pressure c mprise a member turnably mounted on said yoke and engaging on the one hand with said ofn'e presser and on the other hand with said additional presser so that if either of such 'presse'i sis forced up the other is forced proportionately down, and spring means opposing mo- "to'sa'id to'e component, a'heelpre'sser on said yoke to apply pressure to said heel component, an

additional presser on said yoke to apply pressure to said pivotal 'conneotidn, and means for maintaming proportionality of pressure between one of the toe and heel pressers 'andsaid additional presser comprising a c'oupler toothed at opposite sides and joumaiied on said yoke, teeth "on said one of the toe and heel pressers meshing with the teeth at one side of said coupler, teeth on an additional resser meshingwith the teeth at the opposite side of said -coupler, and spring means opposing motion of one of said two last-mentioned pressers.

'7. A press for {clamping a shoe supported on a collapsible -l'ast'consisting of a toe component, a heel component andmeans connecting said components together, said .press comprising *a base, "a'depressible yoke, apivotal attachment between said yoke and said base, a toe presser on said yoke to apply pressure to said toe component, a heel press-emu said yoke-to apply pressure to said heel component, an additional presser on said yoke to "apply pressure to said connecting means, and an abutment on said yoke for receiving "power-produced pressure "to turn said yoke about said pivotal attachment in order to depress said yoke towards said base.

8. A press for clamping a shoe supported on a collpasible last consisting of a toe component, a heel component and means connecting said components together, said press comprising a base, a depressible yoke, a pivotal attachment between said yoke andsaid base, a toe presser on said yoke to apply pressure to said toe component, a heel presser on said yoke to apply pressure to said heel component, an additional presser on said yoke to apply pressure to said connecting means, and a retractable toothed detent on said base for locking said yoke when depressed.

9. A press for clamping a shoe supported by a last and comprising a base whereon the lastsupported shoe is seated, a yoke pivotally connected to said base, interacting members on said base and yoke for locking said yoke in a depressed position, a toe presser and a heel presser mounted at spaced locations on said yoke and arranged to apply pressure when the yoke is depressed to the heel and toe respectively of said last, and an additional presser mounted on said yoke intermediate said toe and heel pressers and adapted to apply pressure to said last at a place between the heel and toe.

10. A press for clamping a shoe supported by a last and comprising a base whereon the lastsupported shoe is seated, a yoke pivotally connected to said base, interacting members on said base and yoke for locking said yoke in a depressed position, a toe presser and a heel presser mounted at spaced locations on said yoke and arranged to apply pressure when the yoke is depressed to the heel andtoe respectively of said last, an additional presser mounted on said yoke intermediate said toe and heel pressers and adapted to apply pressure to said last at a place between the heel and toe, and means mounted on said yoke and coupling one of said toe and heel pressers to said additional presser in order to maintain a predetermined proportionality between pressures applied by said one presser and said additional presser.

11. A press according to claim 10 in which said means for maintaining proportionality of pressure comprise a member turnably mounted on said yoke and engaging on the one hand with said one presser and on the other hand with said additional presser so that if either of such pressers is forced up the other is forced proportionately down, and spring means opposing motion of one of said two last-mentioned pressers.

12. A press for clamping a shoe supported by a last and comprising a base whereon the lastsupported shoe is seated, a yoke pivotally connected to said base, interacting members on said base and yoke for locking said yoke in a depressed position, a toe presser and a heel presser mounted at spaced locations on said yoke and arranged to apply pressure when the yoke is depressed to the heel and toe respectively of said last, an additional presser mounted on said yoke intermediate said toe and heel pressers and adapted to apply pressure to said last at a place between the heel and toe, and means for maintaining proportionality of pressure between one of the toe and heel pressers and said additional presser comprising a coupler toothed at opposite sides and journalled on said yoke, teeth on said one of the toe and heel pressers meshing with the teeth at one side of said coupler, teeth on said additional presser meshing with the teeth at the opposite side of said coupler, and spring means opposing motion of one of said two last-mentioned pressers.

13. A press as claimed in claim 12 in which said coupler meshes with the additional presser and with the heel presser.

14. A press for clamping a shoe supported on a collapsible last consisting-of a toe component,

a heel component and means connecting said.

components together, said press comprising a base, a depressible yoke, a pivotal attachment between said yoke and said base, a toe presser on said yoke to apply pressure to said toe component, a heel presser on said yoke to apply pressure to said heel component, an additional presser on said yoke to apply pressure to said connecting means, a retractable toothed detent on said base for locking said yoke when depressed, an inflatable and deflatable seat on said base for said last-supported shoe, and spring means for returning said yoke from its depressed position on retraction of said detent.

JOHN HOZA. 

